function randomNumber() {
  const now = new Date()
  let month = now.getMonth() + 1
  let day = now.getDate()
  let hour = now.getHours()
  let minutes = now.getMinutes()
  let seconds = now.getSeconds()
  month = this.setTimeDateFmt(month)
  hour = this.setTimeDateFmt(hour)
  minutes = this.setTimeDateFmt(minutes)
  seconds = this.setTimeDateFmt(seconds)
  return now.getFullYear().toString() + month.toString() + day + hour + minutes + seconds + (Math.round(Math.random() * 89 + 100)).toString()
}
